Introduction
This guide will show you how to replace the switch board in your Roland TR-505
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            Carefully separate the 2 half’s 
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            If it’s not coming apart you may need a plastic pry tool to assist you 
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            Once separated:with the ports facing you open the device like a book with the top panel lifted up slightly,make sure to open it to the right 
 
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            Carefully unplug the connectors from their sockets by pulling on the tabs that stick out from the cable 
 
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            with the connectors disconnected you can lift the top half away. 
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            to take the switchboard off take out these PH 1 Philips screws 
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            Thumbs up to Roland for adding arrows to where the screws are on the switch-board:-) 
 
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                            Conclusion
                          
                          To reassemble your device, follow these instructions in reverse order.